[Mrtrix-discussion] mrtrix v3 precisions

[romain valabregue]

Hi Robert

Thanks for the clarification. Just one more precision then
what happend if I have  a list a bvalue like

0 0 0  3005 2995 3000 2990 2995 3010 3005 2985 3005 2990 300

It should not be consider as a multishell. What is then the range you 
consider as being the same b value ?



Note that the documentation :
-shell list
      specify one or more diffusion-weighted gradient shells to use during
      processing ...

this suggest that you can take into account more than one diffusion 
shells ...


romain



Le 21/05/2014 09:10, Robert Smith a écrit :
> Hi Romain
>
>  1. The previous functionality of filter_tracks can now be found in
>     the tckedit command. This command is a bit of a track-editing
>     workhorse; check the -help page to see all of its functionality.
>  2. We currently do not have genuine multi-shell processing, though we
>     hope to introduce it in the future. The -shell option in dwi2fod
>     (the same option also exists in other dwi-related commands) simply
>     specifies the b-value in a multi-shell acquisition to be extracted
>     for use in subsequent processing. If a multi-shell acquisition is
>     received as input, and the -shell option is /not/ provided, the
>     command will extract and use only the highest b-value shell by
>     default.
>
> Cheers
>
> Rob
>
>
>
> --
>
> *Robert Smith, Ph.D*
> Research Officer, Imaging Division
>
> The Florey Institute of Neuroscience and Mental Health
> Melbourne Brain Centre - Austin Campus
> 245 Burgundy Street
> Heidelberg Vic 3084
> Ph: +61 3 9035 7128
> Fax: +61 3 9035 7301
> www.florey.edu.au <http://www.florey.edu.au/>
>
>
> On Wed, May 21, 2014 at 6:25 AM, romain valabregue 
> <romain.valabregue at upmc.fr <mailto:romain.valabregue at upmc.fr>> wrote:
>
>     Hello
>
>     Two short questions about the very nice new version (I just
>     started to test)
>
>     1_ I did not find the equivalent of the previous function
>     filter_tracks
>
>     2_ In the dwi2fod function I do not understand the -sehlll
>     options. Can I use it with a multishell dataset not already ? (the
>     bvalue are already in the gradient table)
>
>
>     Many thanks (and congratulation for the nice viewer)
>
>     Romain
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>

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